ADDENDUM NO. 1 Wastewater Treatment Plant (“WWTP ...

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PUBLIC WORKS DEPARTMENT Engineering Division Mailing Address Operations Division 150 City Park Way 150 City Park Way, Brentwood, CA 94513 2201 Elkins Way Phone (925) 516-5420 www.brentwoodca.gov Phone (925) 516-6000 Fax (925) 516-5421 Fax (925) 516-6001

February 6, 2020

ADDENDUM NO. 1

Wastewater Treatment Plant (“WWTP”) Expansion – Phase II CIP Project No. 592-59140

NOTICE TO BIDDERS: This Addendum No. 1 consists of two (2) pages, plus four (4) attachments, which are listed on the last page, amending the Contract Documents. All prospective bidders for the above-referenced project are to be aware that the following changes, additions and/or clarifications shall be included as an integral part of the Contract Documents for the above-referenced project, and that they are bound by all conditions set forth therein. 1. BID OPENING HAS BEEN CHANGED TO TUESDAY, MARCH 17, 2020 AT 2:00 P.M. 2. ADD Section 11000 in its entirety to the Contract Specifications – Attachment 1. 3. REMOVE and REPLACE Section 11206 page 11206-12, paragraph 2.1.K.1 in its entirety

with the following: “1. The following parts shall be supplied:

a. Four sets motor shaft bearings. b. Four sets seals, gaskets, and O-rings.”

4. REVISE Section 11502 page 11502-10, paragraph 2.4.A as follows:

“The impeller shall be of the open radial flow type, with backward leaning blades and milled from forged aluminum alloy. Impellors shall be anodized. Impellers constructed of any other method or material shall not be acceptable. The impeller must withstand corrosion up to 10 ppm of H2S. The impeller shall be attached to the shaft by interference fit arrangement. The impeller shall be statically and dynamically balanced.”

5. REMOVE Section 11502 page 11502-11, paragraph 2.5.I in its entirety. 6. REMOVE and REPLACE Section 11502 page 11502-11, paragraph 2.6.D in its entirety

with the following:

“D. The following bearing types shall be acceptable:

1. Ball bearing type: Oil lubricated angular contact hybrid roller bearings with steel race and Silicon Nitride (Si3N4) ceramic balls are acceptable in the gearbox. Steel ball bearings shall not be acceptable.

PUBLIC WORKS DEPARTMENT Engineering Division Mailing Address Operations Division 150 City Park Way 150 City Park Way, Brentwood, CA 94513 2201 Elkins Way Phone (925) 516-5420 www.brentwoodca.gov Phone (925) 516-6000 Fax (925) 516-5421 Fax (925) 516-6001

2. Journal type: Cylindrical, journal type drive shaft radial bearings are acceptable. Drive shaft thrust bearings shall be multiple segment designed for thrust in both directions. Pinion shaft radial bearings shall be steel backed tilting pad bearing for optimum rotor stability and the pads babbitted. The bearings shall be designed to suppress hydrodynamic instabilities and provide sufficient dampening to limit rotor vibrations. Fix geometry cylindrical sleeve journal bearings shall not be allowed on the pinion shaft. Pinion shaft thrust bearings shall be multiple segment, tapered land type and designed for thrust in both directions. Radial and thrust bearings shall be pressure lubricated with sufficient oil film thickness under all operating conditions.”

7. REVISE Drawing D-2, Note 1. as follows:

“THIS DRAWING SHALL BE REPLACED BY DRAWING D-2A IF ADDITIVE BID ITEM A2 IS NOT ACCEPTED, REFER TO SPECIFICATION 01025 – MEASUREMENT AND PAYMENT FOR ADDITIONAL DETAIL ON ADDITIVE BID ITEMS.”

8. REVISE Drawing D-2A, Note 1. as follows:

“THIS DRAWING SHALL REPLACE DRAWING D-2 IF ADDITIVE BID ITEM A2 IS NOT ACCEPTED, REFER TO SPECIFICATION 01025 – MEASUREMENT AND PAYMENT FOR ADDITIONAL DETAIL ON ADDITIVE BID ITEMS.”

9. REPLACE Drawing C-24 in its entirety with Attachment 2. 10. REPLACE Drawing C-27 in its entirety with Attachment 3. 11. REPLACE Drawing C-29 in its entirety with Attachment 4.

List of Attachments:

1. Section 11000 – Equipment General Provisions 2. Drawing C-24 REVISED 3. Drawing C-27 REVISED 4. Drawing C-29 REVISED

All bidders shall acknowledge receipt and acceptance of Addendums in the space provided on the Bid Proposal, page 12, of the Contract Documents.

-END OF ADDENDUM NO. -1-

Jagtar (“Jack”) Dhaliwal Project Manager

Wastewater Treatment Plant Expansion - Phase II Equipment General Provisions592-59140 – City of Brentwood Page 11000 - 1

SECTION 11000 – EQUIPMENT GENERAL PROVISIONS

PART 1 GENERAL

1.1 THE REQUIREMENT

A. The Contractor shall provide all tools, supplies, materials, equipment, and all labor necessary for the furnishing, construction, installation, testing, and operation of all equipment and appurtenant work, complete and operable, all in accordance with the requirements of the Contract Documents.

B. The provisions of this Section shall apply to all equipment specified and where referred to, except where otherwise specified or shown.

C. The equipment shown on the Drawings are based on the supply of the first-named supplier. The supplied equipment shall fit within the building or area shown on the Drawings while also maintaining the level of accessibility and clearances shown on the Drawings. If the Contractor selects a System Supplier other than the first-named System Supplier, Contractor shall be responsible for the cost of all modifications required to provide the accessibility and clearance requirements and modifications required of equipment at no additional cost to the Owner. Such changes to the layout shall not impair the equipment accessibility or limit maintenance access as generally indicated on the Drawings, nor shall it relieve the System Supplier’s responsibility for meeting the requirements of the Contract Documents. Any re-design of the equipment structure, foundation, support utilities, or any other related infrastructure needed to accommodate other than the first-named supplier shall be borne by the Contractor, without additional cost to the Owner; any such re-design of related infrastructure shall be by the Owner’s design engineer.

D. Package System Conduit Coordination: The package equipment vendors shall be responsible for coordination of field conduit and wiring. The vendors shall review the electrical drawings prior to bid and identify field conduit and wire that is required for the respective equipment package. If the field conduit and wire required to install the vendors package is not specifically shown on the electrical drawings, the vendor shall be responsible for providing and installing the necessary additional field conduit and wiring. The conduit, fittings, and boxes supplied by the vendor shall meet the code requirements for the area hazard classification defined in the electrical design documents.

1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. Codes: All codes, as referenced herein, are specified in Section 01090, References.

B. Commercial Standards: All equipment, products, and their installation shall be in accordance with the following standards, as applicable, and as specified in each Section of these specifications:

1. ASTM International (ASTM).

2. American Public Health Association (APHA).

3. American National Standards Institute (ANSI)

Attachment 1


4. American Society of Mechanical Engineers (ASME).

5. American Water Works Association (AWWA).

6. American Society of Heating, Refrigerating, and Air Conditioning Engineers(ASHRAE).

7. American Welding Society (AWS).

8. National Fire Protection Association (NFPA).

9. Federal Specifications (FS).

10. National Electrical Manufacturers Association (NEMA).

11. Manufacturer's published recommendations and specifications.

12. General Industry Safety Orders (OSHA).

13. American Petroleum Institute (API)

14. Hydraulic Institute (HI)

C. The following standards have been referred to in this Section of the specifications:

ANSI B16.1 Cast Iron Pipe Flanges and Flanged Fittings Class 25, 125, 250, and 800

ANSI B16.5 Pipe Flanges and Flanged Fittings, Steel, Nickel Alloy, and Other Special Alloys

ANSI B46.1 Surface Texture

ANSI S12.6 Method for the Measurement of the Real-Ear Attenuation of Hearing Protectors

ANSI/ASME B1.20.1 General Purpose Pipe Threads (Inch)

ANSI/ASME B31.1 Power Piping

ANSI/AWWA D100 Welded Steel Tanks for Water Storage

AWWA C206 Field Welding of Steel Water Pipe

ASTM A 48 Specification for Gray Iron Castings

ASTM A 108 Specification for Steel Bars, Carbon, Cold-Finished, Standard Quality

1.3 CONTRACTOR SUBMITTALS

A. Shop Drawings: The Contractor shall furnish complete shop drawings for all equipment specified in the various Sections, together with all piping, valves, and controls for review


by the Engineer in accordance with Section 01340 Shop Drawings, Product Data and Samples.

B. Operators and Maintenance Manual: The Contractor shall provide operations and maintenance manual for all equipment furnished for the project. The data shall be compiled into multiple three-ring binders. Refer to specification Section 01340 Shop Drawings, Product Data and Samples. for specific requirements.

C. Tools: The Contractor shall supply one complete set of special wrenches and other special tools necessary for the assembly, adjustment, and dismantling of the equipment. All tools shall be of best quality hardened steel forgings with bright, finish wrench heads shall have work faces dressed to fit nuts. All tools shall be suitable for professional work and manufactured by a recognized supplier of professional tools such as Snap On, Crescent, Stanley, or equal. The set of tools shall be neatly mounted in a labeled tool box of suitable design provided with a hinged cover.

D. Spare Parts: The Contractor shall obtain and submit from the manufacturer a list of suggested spare parts for each piece of equipment. After approval, Contractor shall furnish such spare parts suitably packaged, identified with the equipment number, and labeled. Contractor shall also furnish the name, address, and telephone number of the nearest distributor for each piece of equipment. All spare parts are intended for use by the Owner, only after expiration of the guaranty period.

E. Torsional Analysis: The Contractor shall submit to the Engineer a torsional and lateral vibration analysis of the following equipment, in accordance with Section 01340 Shop Drawings, Product Data and Samples. The analysis has to be performed by a specialist experienced in this type of work and approved by the Engineer.

1. All engine drives.

2. All blowers and compressors with drives of 100 horsepower and over.

3. All vertical pumps with universal joints and extended shafts.

4. All other equipment where specified.

5. The torsional natural frequency of the drive train must be avoided by + 25 percentby any exciting frequency of the equipment, throughout the entire operatingrange.

F. Vibration Analysis: In his bid price the Contractor shall include at least two site visits of the abovementioned specialist, during construction and testing of the equipment, to analyze and measure the amount of equipment vibration and make his written recommendation for keeping the vibration at a safe limit.

G. Electrical/Instrumentation Submittals. Submit complete electrical and instrumentation and control information in sufficient detail to allow installation of instrumentation and controls, and electrical components, and demonstrate full compliance with these Specifications. Specifically, the following is required:

1. Instrument data sheets and catalog data giving full technical details of eachinstrument device. Complete instrumentation and control schematics, presented in conformance with ISA Bulletin S5.1, latest edition.


2. Controller Input/Output Lists, where applicable, identifying all input andoutputs used by the system, Include detailed memory mapping scheme from network transfer of system operational data and conform the data mapping structure to the City data exchange requirements as specified in Section 13400.

3. Control programming ladder logic or sequential logic diagrams.

4. Point-to-point component interconnection diagrams.

5. Wire numbers and/or color coding.

6. Terminal numbers.

7. Operation, installation and troubleshooting instructions.

8. Complete outline drawings showing such details as are necessary to locateconduit stubups and field wiring. Standard preprinted sheets or drawings simply marked to indicate applicability to this Contract will not be acceptable.

9. Submit complete equipment fabrication drawings for control panels toinclude the following:

a. Scaled cabinet assembly and layout drawings including internaland external views.

b. Control panel front elevation showing all face-mountedinstruments, control panel interior layout drawing showing locationof major components, motor controls, control power transformers,fuses, circuit breakers and point-to-point wiring drawings.

c. Detailed bill of materials for all components includingmanufacturers name, description and catalog number.

d. Fabrication and painting specifications.

e. Recommended spare parts list.

f. Catalog information and performance specifications on all devicessuch as, but not limited to, circuit breakers, control powertransformers, motor starters, terminal blocks, AC or DC drivecontrollers, switches, lights, timers, relays and related equipment.

10. Provide flow chart style logic diagrams showing the operation logic includingprocess and safety interlocks. Instrument and logic diagrams and schematics shall be prepared using ISA Standard symbols with the identification letters as shown on the P & ID Legend and Notes Drawings.

11. Submit panel cooling calculations confirming that all components shalloperate at or below their maximum rated temperature at the maximum ambient temperature conditions at the site as specified in the Contract


Documents during full rated operation of the mechanical system. Provide additional cooling equipment at no additional cost to the City if required to achieve the operation within the tolerances of the provided equipment.

12. Sequence of Operation describing in detail the various steps of operation in their proper order.

1.4 QUALITY ASSURANCE

A. Inspection, Startup, and Field Adjustment: The Contractor shall demonstrate that all equipment meets the specified performance requirements. Contractor shall provide the services of an experienced, competent, and authorized service representative of the manufacturer of each item of major equipment who shall visit the site of Work to perform the following tasks:

1. Assist the Contractor in the installation of the equipment.

2. To inspect, check, adjust if necessary and approve the equipment installation.

3. To start-up and field-test the equipment for proper operation, efficiency, and capacity.

4. To perform necessary field adjustments during the test period until the equipment installation and operation are satisfactory to the Engineer.

5. To instruct the Owner's personnel in the operation and maintenance of the equipment. Instruction shall include step-by-step trouble shooting procedures with all necessary test equipment.

B. Costs: The costs of all inspection, startup, testing, adjustment, and instruction work performed by said factory-trained representatives shall be borne by the Contractor. The Owner will pay for costs of power and water. When available, the Owner’s operating personnel will provide assistance in the field testing.

C. Public Inspection: It shall be the responsibility of the Contractor to inform the local authorities, such as building and plumbing inspectors, fire marshall, OSHA inspectors, and others, to witness all required tests for piping, plumbing, fire protection systems, pressure vessels, safety systems, etc., to obtain all required permits and certificates, and pay all fees.

D. Tolerances: Tolerances and clearances shall be as shown on the shop drawings and shall be closely adhered to. Machine work shall in all cases be of high-grade workmanship and finish, with due consideration to the special nature or function of the parts. Members without milled ends and which are to be framed to other steel parts of the structure may have a variation in the detailed length of not greater than 1/16-inch for members 30 feet or less in length, and not greater than 1/8-inch for members over 30 feet in length.

E. Machine Finish: The type of finish shall be the most suitable for the application and shall be shown in micro-inches in accordance with ANSI B46.1. The following finishes shall be used:


1. Surface roughness not greater than 63 micro-inches shall be required for allsurfaces in sliding contact.

2. Surface roughness not greater than 250 micro-inches shall be required forsurfaces in contact where a tight joint is not required.

3. Rough finish not greater than 500 micro-inches shall be required for othermachined surfaces.

4. Contact surfaces of shafts and stems which pass through stuffing boxes andcontact surfaces of bearings shall be finished to not greater than 32 micro-inches.

1.5 MANUFACTURER'S EXPERIENCE:

A. Unless otherwise directed by the ENGINEER, all equipment furnished shall have a record of at least 5 years of successful, trouble free operation in similar applications, from the same manufacturer.

B. The manufacturer shall also have sufficient installation experience and financial stability to ensure long-term capability to furnish, install, and service the equipment.

1.6 MANUFACTURER’S SERVICE REPRESENTATIVE

A. Inspection, Startup, and Field Adjustment: Where required by the equipment Sections, an authorized service representative of the manufacturer shall visit the site for the number of days indicated in those Sections to witness the following and to certify in writing that the equipment and controls have been properly installed, aligned, lubricated, adjusted, and readied for operation.

1. Installation of the equipment.

2. Inspection, checking, and adjusting the equipment.

3. Startup and field testing for proper operation.

4. Performing field adjustments to ensure that the equipment installation andoperation comply with requirements.

B. Instruction of the Owner's Personnel:

1. Where required by the individual equipment Sections, an authorized trainingrepresentative of the manufacturer shall visit the site for the number of daysindicated in those Sections to instruct the Owner’s personnel in the operation andmaintenance of the equipment, including step-by-step troubleshooting withnecessary test equipment. Instruction shall be specific to the models of equipmentprovided.

2. The representative shall have at least two years experience in training. A resumefor the representative shall be submitted.

3. Training shall be scheduled a minimum of three weeks in advance of the firstsession.


4. Proposed training material and a detailed outline of each lesson shall be submitted for review. Comments shall be incorporated into the material.

5. The training materials shall remain with the trainees.

6. The Owner may videotape the training for later use with the Owner’s personnel.

1.7 SPECIAL COORDINATION

A. Plant SCADA/HMI System Communication Interface: The mechanical system supplier shall coordinate with the PCSI to ensure that the control panels furnished with mechanical equipment as “package controls” provided with communications interface can be connected to the overall plant wide communication network for control and monitoring from the plant HMI system.

1. The mechanical equipment supplier shall provide graphic interface panel (GIP) displays for the system. Provide both printed and electronic format to the Contractor. Include all data points and pop-up windows.

2. Provide a PLC memory map that details tag names, addresses, and descriptions for all data available to the HMI system. The data shall be packed into a contiguous register array that includes both digital and analog data. The data array shall include at least 25% spare registers.

3. Communications to the HMI system shall be via the plant’s PLC network and shall utilize Modbus TCP protocol except where specifically shown as hardwired on the Drawings or specified.

B. This coordination effort shall take place during the shop drawing process and during the control system Coordination Workshops as specified under Section 13400.

PART 2 PRODUCTS

2.1 GENERAL

A. High Noise Level Location: The Contractor shall provide one personal hearing protection station, as specified herein, at each high noise level location. Said locations are defined as follows:

1. Outdoor Location: Any single equipment item or any group of equipment items that produce noise exceeding OSHA noise level requirements for a 2-hour exposure. Where such equipment is separated by a distance of more than 20 feet, measured between edges of footings, each group of equipment shall be provided with a separate hearing protection station.

2. Indoor Location:

a. Any single equipment item, or any group of equipment items, located within a single room not normally occupied, that produces noise exceeding OSHA noise level requirements for a 2-hour exposure.


b. Any single equipment item, or any group of equipment items, located withina single room normally occupied by workers, that produces noise exceedingOSHA noise level requirements for an 8-hour exposure.

B. Personal Hearing Protection: The Contractor shall supply, in their original unopened packaging, three pairs of high attenuation hearing protectors. The ear protectors shall be capable of meeting the requirements of ANSI S12.6 and shall produce a noise level reduction of 25 dBA at a frequency of 500 Hz. The hearing protectors shall have fluid filled ear cushions and an adjustable, padded headband. The protectors shall be stored in a weatherproof, labeled, steel cabinet, furnished by the Contractor and mounted in an approved location near the noise producing equipment.

C. Service Factors: Service factors shall be applied in the selection or design of mechanical power transmission components. Unless otherwise specified, the following load classifications shall apply in determining service factors:

Type of Equipment Load ClassificationBlower:

Centrifugal or vane UniformLobe Moderate Shock

Reciprocating Air Compressor:Multi-Cylinder Moderate ShockSingle-Cylinder Heavy Shock

Pump:Centrifugal or Rotary UniformReciprocating Moderate Shock

Mixer:Constant Density UniformVariable Density Moderate Shock

Flocculator or Clarifier UniformSludge Thickener Moderate ShockGrit Handling Equipment Moderate ShockTrash Rack Rake Moderate ShockCrane or Hoist Moderate Shock

D. For service factors of electric motors, see Section 16220, Low Voltage Motors. Where load classifications are not specified, best modern practice shall be used.

E. Welding: Unless otherwise specified or shown, all welding shall conform to the following:

1. Latest revision of ANSI/AWWA D100.

2. Latest revision of AWWA C206.

3. All composite fabricated steel assemblies which are to be erected or installedinside a hydraulic structure, including any fixed or movable structural componentsof mechanical equipment, shall have continuous seal welds to prevent entrance ofair or moisture.

4. All welding shall be by the metal-arc method or gas-shielded arc method asdescribed in the American Welding Society's "Welding Handbook" as

Wastewater Treatment Plant Expansion - Phase II Equipment General Provisions592-59140 – City of Brentwood 000 - 9

supplemented by other pertinent standards of the AWS. Qualification of welders shall be in accordance with the AWS Standards governing same.

5. In assembly and during welding, the component parts shall be adequatelyclamped, supported, and restrained to minimize distortion and for control ofdimensions. Weld reinforcement shall be as specified by the AWS code. Uponcompletion of welding, all weld splatter, flux, slag, and burrs left by attachmentsshall be removed. Welds shall be repaired to produce a workmanlikeappearance, with uniform weld contours and dimensions. All sharp corners ofmaterial which is to be painted or coated shall be ground to a minimum of 1/32-inch on the flat.

F. Protective Coating: All equipment shall be painted or coated in accordance with Section 09900 – Paints and Coatings, unless otherwise indicated. Non-ferrous metal and corrosion-resisting steel surfaces shall be coated with grease or lubricating oil. Coated surfaces shall be protected from abrasion or other damage during handling, testing, storing, assembly, and shipping.

G. Vibration Level: All equipment subject to vibration shall be provided with restrained spring-type vibration isolators or pads per manufacturer's written recommendations.

H. Shop Fabrication: Shop fabrication shall be performed in accordance with the Contract Documents and the Engineer-approved shop drawings.

2.2 EQUIPMENT SUPPORTS AND FOUNDATIONS

A. Equipment Supports: All equipment supports, anchors, and restrainers shall be adequately designed for static, dynamic, wind (specification Section 01614), and seismic loads (specification Section 01612). The design horizontal seismic force shall be the greater of: that noted in the general structural notes or as required by the governing building code, or 10 percent of gravity. Submitted design calculations for equipment supports must bear the signature and seal of an engineer registered in the State wherein the project is to be built, unless otherwise directed.

B. Equipment Foundations: Equipment foundations shall be as per manufacturer's written recommendations. All mechanical equipment, tanks, control cabinets, etc., shall be mounted on minimum 3.5-inch high concrete bases, as shown on standard structural details, unless otherwise shown or specified.

C. Shop Drawings: Shop drawings shall be submitted to the Engineer for review in accordance with the requirements of Section 01340 Shop Drawings, Product Data and Samples. Shop drawings will be considered incomplete unless clear, concise calculations are presented showing equipment anchorage forces and the capacities of the anchorage elements provided by the Contractor.

2.3 PIPE HANGERS, SUPPORTS AND GUIDES

A. All pipe connections to equipment shall be supported, anchored, and guided to avoid stresses and loads on equipment flanges and equipment. Supports and hangers shall be in accordance with the requirements of Section 15006 - Pipe Supports.


2.4 FLANGES AND PIPE THREADS

A. All flanges on equipment and appurtenances provided under this Section shall conform to ANSI B16.1, Class 125; or B16.5, Class 150, unless otherwise shown. All pipe threads shall be in accordance with ANSI/ASME B1.20.1, and with requirements of Section 15000 – Piping, General.

2.5 COUPLINGS

A. Flexible couplings shall be provided between the driver and the driven equipment to accommodate slight angular misalignment, parallel misalignment, end float, and to cushion shock loads. Where required for vertical shafts, 3-piece spacer couplings or universal type couplings for extended shafts shall be installed.

B. The Contractor shall have the equipment manufacturer select or recommend the size and type of coupling required to suit each specific application.

C. Taper-lock bushings may be used to provide for easy installation and removal on shafts of various diameters.

D. Where universal type couplings are shown, they shall be of the needle bearing type construction, equipped with commercial type grease fittings.

2.6 SHAFTING

A. General: All shafting shall be continuous between bearings and shall be sized to transmit the power required. Keyways shall be accurately cut in line. Shafting shall not be turned down at the ends to accommodate bearings or sprockets whose bore is less than the diameter of the shaft. All shafts shall rotate in the end bearings and shall be turned and polished, straight, and true.

B. Materials: Shafting materials shall be appropriate for the type of service and torque transmitted. Environmental elements such as corrosive gases, moisture, and fluids shall be taken into consideration. Materials shall be as shown or specified unless furnished as part of an equipment assembly.

1. Low carbon cold-rolled steel shafting shall conform to ASTM A108, Grade 1018.

2. Medium carbon cold-rolled shafting shall conform to ASTM A108, Grade 1045.

3. Corrosion-resistant shafting shall be stainless steel or Monel, whichever is mostsuitable for the intended service.

C. Differential Settlement: Where differential settlement between the driver and the driven equipment may be expected, a shaft of sufficient length with 2 sets of universal type couplings shall be provided.

2.7 BEARINGS

A. General: Bearings shall conform to the standards of the Anti-Friction Bearing Manufacturers Association, Inc. (AFBMA).


B. To assure satisfactory bearing application, fitting practice, mounting, lubrication, sealing, static rating, housing strength, and other important factors shall be considered in bearing selection.

C. All re-lubricatable type bearings shall be equipped with a hydraulic grease fitting in an accessible location and shall have sufficient grease capacity in the bearing chamber.

D. All lubricated-for-life bearings shall be factory-lubricated with the manufacturer's recommended grease to insure maximum bearing life and best performance.

E. Bearing Life: Except where otherwise specified or shown, all bearings shall have a minimum L-10 life expectancy of 5 years or 20,000 hours, whichever occurs first. Where so specified, bearings shall have a minimum rated L-10 life expectancy corresponding to the type of service, as follows:

Type of ServiceDesign Life

(years)

L-10 Design Life(hours)

(whichever comes first)

8-hour shift 10 20,000

16-hour shift 10 40,000

Continuous 10 60,000

F. Bearing housings shall be of cast iron or steel and bearing mounting arrangement shall be as specified or shown, or as recommended in the published standards of the manufacturer. Split-type housings may be used to facilitate installation, inspection, and disassembly.

G. Sleeve-type bearings shall have a Babbitt or bronze liner.

2.8 GEARS AND GEAR DRIVES

A. Unless otherwise specified, gears shall be of the helical or spiral-bevel type, designed and manufactured in accordance with AGMA Standards, with a minimum service factor of 1.7, a minimum L-10 bearing life of 60,000 hours and a minimum efficiency of 94 percent. Worm gears shall not be used, unless specifically approved by the Engineer.

B. All gear speed reducers or increasers shall be of the enclosed type, oil- or grease-lubricated and fully sealed, with a breather to allow air to escape but keep dust and dirt out. The casing shall be of cast iron or heavy-duty steel construction with lifting lugs and an inspection cover for each gear train. An oil level sight glass and an oil flow indicator shall be provided, arranged for easy reading.

C. Gears and gear drives as part of an equipment assembly shall be shipped fully assembled for field installation.

D. Material selections shall be left to the discretion of the manufacturer, provided the above AGMA values are met. Input and output shafts shall be adequately designed for the service and load requirements. Gears shall be computer-matched for minimum tolerance variation. The output shaft shall have 2 positive seals to prevent oil leakage.


E. Oil level and drain location relative to the mounting arrangement shall be easily accessible. Oil coolers or heat exchangers with all required appurtenances shall be furnished when necessary.

F. Where gear drive input or output shafts have to connect to couplings or sprockets supplied by others, the Contractor shall have the gear drive manufacturer supply matching key taped to the shaft for shipment.

2.9 DRIVE CHAINS

A. Power drive chains shall be commercial type roller chains and meet ANSI Standards.

B. A chain take-up or tightener shall be provided in every chain drive arrangement to provide easy adjustment.

C. A minimum of one connecting or coupler link shall be provided with each length of roller chain.

D. Chain and attachments shall be of the manufacturer's best standard material and suitable for the process fluid.

2.10 SPROCKETS

A. General: Sprockets shall be used in conjunction with all chain drives and chain-type material handling equipment.

B. Materials: Unless otherwise specified, materials shall be as follows:

1. Sprockets with 25 teeth or less, normally used as a driver, shall be made ofmedium carbon steel in the 0.40 to 0.45 percent carbon range.

2. Type A and B sprockets with 26 teeth or more, normally used as driven sprockets,shall be made of minimum 0.20 percent carbon steel.

3. Large diameter sprockets with Type C hub shall be made of cast iron conformingto ASTM A48, Class 30.

C. All sprockets shall be accurately machined to ANSI Standards. Sprockets shall have deep hardness penetration in tooth sections.

D. Finish bored sprockets shall be furnished complete with keyseat and set screws.

E. To facilitate installation and disassembly, sprockets shall be of the split type or shall be furnished with taper-lock bushings as required.

F. Idler sprockets shall be furnished with brass or Babbitt bushings, complete with oil hole and axial or circumferential grooving. Steel collars with set screws may be provided in both sides of the hub.

2.11 V-BELT DRIVES

A. V-belts and sheaves shall be of the best commercial grade and shall conform to ANSI, MPTA, and RMA Standards.


B. Unless otherwise specified, sheaves shall be machined from the finest quality gray cast iron.

C. All sheaves shall be statically balanced. In some applications where vibration is a problem, sheaves shall be dynamically balanced. Sheaves operating at belt speeds exceeding 6,500 fpm may be required to be of special materials and construction.

D. To facilitate installation and disassembly, sheaves shall be furnished complete with taper-lock or QD bushings as required.

E. Finish bored sheaves shall be furnished complete with keyseat and set screws.

F. Sliding motor bases shall be provided to adjust the tension of V-belts.

2.12 DRIVE GUARDS

A. All power transmission, prime movers, machines, shaft extensions, and moving machine parts shall be guarded to conform with the Division of Industrial Safety General Industrial Safety Orders latest edition and OSHA Safety and Health Standards (29CFR1910). The guards shall be constructed of minimum 10 gage expanded, flattened steel with smooth edges and corners, galvanized after fabrication and securely fastened. Where required for lubrication or maintenance, guards shall have hinged and latched access doors.

2.13 FLEXIBLE CONNECTORS

A. Flexible connectors shall be installed in all piping connections to engines, blowers, compressors, and other vibrating equipment and in piping systems in accordance with the requirements of the Section 15000 - Piping, General.

2.14 INSULATING CONNECTIONS

A. Insulating bushings, unions, couplings, or flanges, as appropriate, shall be used in accordance with the requirements of the Section 15000 - Piping, General.

2.15 GASKETS AND PACKINGS:

A. Gaskets for sleeve-type couplings shall be rubber-compound material that will not deteriorate from age or exposure to air under normal storage or use conditions Gaskets for wastewater and sewerage applications shall be Buna “N”, grade 60, or equivalent suitable elastomer. The rubber in the gasket shall meet the following specifications:

1. Color - Jet Black.

2. Surface - Non-blooming.

3. Durometer Hardness - 745

4. Tensile Strength – 1000 psi Minimum

5. Elongation – 175 percent Minimum

B. The gaskets shall be immune to attack by impurities normally found in water or wastewater. All gaskets shall meet the requirements of ASTM D2000, AA709Z, meeting


Suffix. B13 Grade 3, except as noted above. All gaskets shall be compatible with the piping service and fluid utilized.

C. Packing around valve stems and reciprocating shafts shall be of compressible material, compatible with the fluid being used. Chevron-type "V" packing shall be Gatlock No. 432, John Crane "Everseal," or equal.

D. Packing around rotating shafts (other than valve stems) shall be "O"-rings, stuffing boxes, or mechanical seals, as recommended by the manufacturer and approved by the Engineer, in accordance with Section 11100 – Pumps, General.

2.16 NAMEPLATES

A. Equipment nameplates of stainless steel shall be engraved or stamped and fastened to the equipment in an accessible location with No. 4 or larger oval head stainless steel screws or drive pins. Nameplates shall contain the manufacturer's name, model, serial number, size, characteristics, and appropriate data describing the machine performance ratings.

2.17 SAFETY REQUIREMENTS

A. Where work areas are located within a flammable or toxic gas environment, suitable gas detection, ventilating, and oxygen deficiency equipment shall be provided. Workers shall be equipped with approved breathing apparatus.

2.18 OVERLOAD PROTECTION

A. General: Unless otherwise specified in individual equipment Sections, all equipment drives incorporating overload protection shall be provided with an overload protection device as follows:

1. Mechanical System: The overload protection shall be a mechanical device toprovide for reliable protection in the event of excessive overload. It shall be a balldetent type designed for long-term repeatability and life. It shall be infinitelyadjustable by a single adjusting nut. Once set it shall be tamperproof, andincorporate a torque monitoring and control system. It shall activate an alarm setfor 85 percent, and a motor cutout switch set for 100 percent of maximumcontinuous running torque. A visual torque indication shall be provided andoriented so that it may be read from the walkway. The dial shall be calibratedfrom 0 to 100 percent of maximum continuous running torque. The design of thetorque limiter should initiate the mechanical disengagement of the drive uponoverload. Each unit shall be suitable for outdoor/corrosive environments with aprotective finish, corrosion inhibiting lubricants and a stainless steel cover.

2. Electronic System

a. As an alternative to the mechanical system, the overload protection may bean Electronic Torque Monitoring Control System capable of displayingtorque, rpms, one level of overload, and two levels of overload of the drivesystem. It shall incorporate a time-delay for startup and a voltagemonitoring and compensation circuit for up to +15 percent variation.

b. The overload device shall have an enclosure suitable for outdoor installationat temperatures of 0-70 degrees C, and relative humidity up to 95 percent.


A visual torque dial shall be provided and oriented so that it can be easily read from the walkway.

c. The torque monitoring system shall be calibrated to: alarm and shut downthe system in the event the torque drops to 50 percent of normal running; alarm at 85 percent of maximum continuous running torque and shut down the motor at maximum continuous running torque of the equipment. The system shall be calibrated at the factory of the equipment manufacturer and it shall be capable of monitoring twice the maximum continuous running torque of the equipment.

B. Manufacturers, or Equal:

1. American Autogard Corporation.

2. Ferguson Machine Company.

PART 3 EXECUTION

3.1 DELIVERY AND STORAGE

A. A complete set of manufacturer’s instructions covering storage, installation, operation, lubrication, and maintenance shall be furnished to the OWNER no later than the date the equipment is shipped. Care during storage and procedures for installation, lubrication, and startup of the equipment and motors shall be in strict conformance with the manufacturer’s instructions.

B. The CONTRACTOR shall prepare and load all material and articles for shipment in a manner that protects the equipment and coatings from damage in transit, shall include a packing list, and shall be responsible for and make good any and all damage. During shipping the rotating elements shall be suitably supported or disassembled to protect bearings.

C. Equipment furnished shall be shipped to the site in enclosed, weather-tight, sealed containers in a manner designed to protect the pumping units against damaging stress caused by sudden acceleration or deceleration. For equipment 25 horsepower or greater, two recording accelerometers, designed to record the magnitude of any sudden impact in all three directions (X, Y, Z) on continuous strip charts, shall be shipped with, and fixed to each assembly or its packing container. Upon arrival of each shipment, the accelerometers shall be removed in the presence of representatives of the ENGINEER, the CONTRACTOR, and the equipment manufacturer. If magnitude of the maximum acceleration exceeds 3.0 times the acceleration due to the force of gravity (3.0 g), the assembly or subassembly shall be dismantled and completely inspected. All damage shall be corrected to the complete satisfaction of the ENGINEER before the assembly is incorporated into the work. The CONTRACTOR shall bear all costs arising out of dismantling, inspection, repair, and reassembly.

D. Where necessary, heavy parts or machines shall be mounted on skids or shall be crated, and any articles or materials that might otherwise be lost shall be boxed or wired in bundles and plainly marked for identification. The gross weight shall be clearly marked on all boxes or skidded equipment packages exceeding 200 pounds. All parts exceeding 200 pounds gross weight shall be prepared for shipment so that slings for handling by a crane may be readily attached while the parts are on the car or transport truck. Boxed parts, where it is unsafe to attach slings to the box, shall be packed with


slings attached to the part, the slings to project through the box or crate so that attachment to the hoisting equipment can be readily made.

E. All accessories and spare parts shall be packed separately in containers plainly marked “ACCESSORIES ONLY” or “SPARE PARTS ONLY.” All packing materials shall be fire retardant. A packing list, listing the contents of each container, shall be placed in a moisture proof envelope and securely fastened to the outside of the container.

F. All parts shall be properly lubricated and protected so that no damage or deterioration will occur even during a prolonged delay from the time of shipment until installation is completed and the pumps are ready for operation.

G. Finished ferrous surfaces not painted shall be properly protected to prevent rust and corrosion.

H. The finished surfaces of all exposed flanges shall be protected by strong wooden blind flanges.

I. Each equipment shall be properly crated to protect the units against damage during shipment.

3.2 INSTALLATION

A. Install in accordance with the manufacturer's printed instructions.

B. Alignment: All equipment shall be field tested to verify proper alignment, operation as specified, and freedom from binding, scraping, vibration, shaft runout, or other defects. Equipment drive shafts shall be measured just prior to assembly to ensure correct alignment without forcing. Equipment shall be secure in position and neat in appearance.

C. Lubricants: The CONTRACTOR shall provide the necessary oil and grease for initial operation.

D. The CONTRACTOR shall accomplish installation with assistance from the Manufacturer.

3.3 TESTING

A. General: Provide testing in accordance with Section 01660 Testing and Training.

B. Factory Testing

1. The CONTRACTOR shall be responsible for all costs associated with inspectionand testing of materials, products, or equipment at the place of manufacture,unless specified otherwise.

2. The following tests shall be conducted on each indicated system:

a. Motors: All motors of sizes 100 hp and larger shall be assembled, tested,and certified at the motor factory and the working clearances checked toensure that all parts are properly fitted. The tests shall be in accordancewith ANSI/IEEE 112 - Test Procedure for Polyphase Induction Motors andGenerators, and ANSI/IEEE 115 - Test Procedure for Synchronous


Machines, including heat run and efficiency tests. All computations shall be recorded and certified and dated copies of the test results shall be furnished.

b. Equipment Systems: All equipment systems 10 hp and larger shall be tested at the factory in accordance with the applicable American National Standard. Tests shall be performed using the complete system to be furnished, including the motor. For motors smaller than 100 hp, the manufacturer's certified test motor shall be acceptable. Testing of prototype models will not be acceptable.

c. Factory Witnessed Tests: All equipment, variable speed drives, and motors, 125 hp and larger shall be factory-tested as complete assembled systems and may be witnessed by the OWNER and ENGINEER. The CONTRACTOR shall give the ENGINEER a minimum of 2 weeks notification prior to the test. At least 2 weeks prior to the test, CONTRACTOR shall submit for review and approval a copy of the proposed test procedure. All costs for OWNER and ENGINEER shall be borne by the OWNER. Test results shall be submitted to the ENGINEER and no equipment shall be shipped until the test data have been approved by the ENGINEER.

d. Acceptance: In the event of failure of any equipment to meet any of the requirements, the CONTRACTOR shall make all necessary modifications, repairs, or replacements to conform to the requirements of the Contract Documents and the pump shall be re-tested at no additional cost to the OWNER until found satisfactory.

C. Functional Testing

1. The CONTRACTOR shall bear all costs of the functional tests, including related services of the manufacturer's representative, except for power and water which the OWNER will bear. If available, the OWNER’S operating personnel will provide assistance in functional testing. All equipment and instrumentation required for the testing shall be provided by the CONTRACTOR.

2. The final adjustments and inspections shall be made by factory-trained and authorized service personnel other than sales representatives, who also shall supervise the installation and test operation. CONTRACTOR shall include in bid, allowance for factory-trained service personnel to adjust all of the said equipment to be installed by CONTRACTOR until this equipment has been tested by the CONTRACTOR and the results of these tests are satisfactory to the ENGINEER or his designated representative.

3. Functional testing will be witnessed by the ENGINEER. The CONTRACTOR shall give notice to the OWNER/ ENGINEER two weeks prior to the scheduled functional field test date.

4. At least 2 weeks prior to the test, CONTRACTOR shall submit for review and approval a copy of the proposed functional test procedure.

5. The following functional testing shall be conducted:

a. Electrical and instrumentation tests shall conform to the requirements of the Sections under which that equipment is specified.

b. The equipment shall operate as described under the control strategy outlined in the instrumentation specification.


c. A field functional acceptance test shall be made of the entire system,including instruments, controls, alarms, plant control system, controlstrategy, motors, VFDs, and valves, to ensure compliance with theperformance specified herein.

6. In the event any system fails to meet the test requirements, it shall be modifiedand retested as above until it satisfies the requirements.

7. After each equipment system has satisfied the requirements, the CONTRACTORshall certify in writing that it has been satisfactorily tested and that all finaladjustments have been made. Certification shall include the date of the tests, alisting of all persons present during the tests, and the test data

D. Performance Testing

1. Where required by the individual equipment sections, each system shall beperformance tested, after installation to demonstrate satisfactory operationwithout excessive noise, vibration, or overheating of bearings. The performance ofeach equipment, motor, and VFD shall be verified.

2. All expenses for conducting the performance testing shall be paid by theCONTRACTOR. All equipment and instrumentation required for the testing shallbe provided by the CONTRACTOR.

3. The final adjustments and inspections shall be made by factory-trained andauthorized service personnel other than sales representatives, who also shallsupervise the installation and test operation. CONTRACTOR shall include in bid,allowance for factory-trained service personnel to adjust all of the said equipmentto be installed by CONTRACTOR until this equipment has been tested by theCONTRACTOR and the results of these tests are satisfactory to the ENGINEERor his designated representative.

4. Performance testing will be witnessed by the ENGINEER. The CONTRACTORshall give notice to the OWNER/ENGINEER 2 weeks prior to the scheduled testdate.

5. At least 2 weeks prior to performance test, CONTRACTOR shall submit for reviewand approval a copy of the proposed performance test procedure.

6. The following performance testing shall be conducted:

a. Startup, check, and operate the system over its entire speed range.Vibration shall be within the amplitude limits recommended by the specifiedStandards over the range of operating conditions defined by theENGINEER.

b. Obtain concurrent readings of motor voltage, amperage, for at least fouroperating conditions. Check each power lead to the motor for proper currentbalance.

c. Determine bearing temperatures by contact type thermometer. A run time ofat least 20 minutes shall precede this test, unless insufficient liquid volumeis available.

7. The tests shall demonstrate that the equipment has been properly installed,aligned and connected, is free of mechanical defects, electrical defects, excessive


vibration, overheating or overloading, and that the control system performs as specified and meets all operating criteria. All parts shall operate satisfactorily in all respects and in accordance with the specified requirements for the full duration of the test period. If any part of a unit shows evidence of unsatisfactory or improper operation during the test period, correction or repairs shall be made by the CONTRACTOR and the full performance test shall be redone for that unit after all parts operate satisfactorily.

8. After each pumping system has satisfied the requirements, the CONTRACTORshall certify in writing that it has been satisfactorily tested and that all finaladjustments have been made. Certification shall include the date of the tests, alisting of all persons present during the tests, and the test data.

E. Operational Testing

1. Operational testing shall follow the requirements listed in Section 01660 Testingand Training.

3.4 COUPLINGS

A. The Contractor shall have the equipment manufacturer select or recommend the size and type of coupling required to suit each specific application; installation shall be per equipment manufacturer's printed recommendations.

3.5 INSULATING CONNECTIONS

A. All insulating connections shall be installed in accordance with the manufacturer's printed instructions.

3.6 PIPE HANGERS, SUPPORTS, AND GUIDES

A. Hangers, supports, and guides shall be spaced in accordance with ANSI/ASME B.31.1 standard, and with tables in Section 15006 - Pipe Supports.

3.7 PACKAGED EQUIPMENT

A. When any system is furnished as pre-packaged equipment, the Contractor shall coordinate all necessary space and structural requirements, clearances, utility connections, signals, and outputs with his subcontractors, to avoid later change orders.

B. If the packaged system has any additional features (as safety interlocks, etc.), other than specified, the Contractor shall coordinate such features with the Engineer and furnish all material and labor necessary for a complete installation as required by the manufacturer, at no additional cost to the Owner.

C. The CONTRACTOR shall assign to a single MANUFACTURER full responsibility for the furnishing and functional operation of each type of blower, compressor, or vacuum pump unit(s) including drives, drive motors, speed control equipment (where variable speed drives are required), and accessories. The MANUFACTURER shall also provide any required control panels with required circuit breakers, motor starters, required selector switches, pushbuttons, and lights in conformance with Section 13420 – Control Panels and hardware. The designated single MANUFACTURER, however, need not manufacture more than one part of the unit(s) (blower, or motor and drive) unless


specified otherwise, but shall coordinate the design, assembly, testing, and erection of the unit(s) as specified herein.

3.8 PROCESS CONTROL SYSTEMS

A. The mechanical system supplier shall perform and complete system testing per Section 13490 prior to integrating the system into the overall process.

B. Factory testing shall be performed on system control panels, PLC control logic programming, HMI graphics, and network addressing prior to being shipped to the site.

C. Field testing shall be performed on equipment within the process skid. This shall include loop and component inspections for all loops or control subsystems, wiring, and calibration of all electrical devices and instruments.

END OF SECTION

R.C.E. No. 87268 REGISTRATION EXPIRES 09-30-2021KEVIN R. RANDENI

12-20-2019BAR IS ONE INCHVERIFY SCALES

LONG ON FULL

IF NOT ONE INCHSIZE DRAWING.

LONG ON THISDRAWING, ADJUST

SCALES ACCORDINGLY

0" 1"

BY APP DATEREVISIONSNO.

PUBLIC WORKSDEPARTMENT

150 City Park Way, Brentwood, CA 94513Ph: (925) 516-5420 · FAX: (925) 516-5421

www.brentwoodca.gov

SHEETS

DRAWING

OF 366CALIFORNIABRENTWOOD

WASTEWATER TREATMENT PLANT EXPANSION - PHASE II

DESIGN:

DRAWN:

CHECKED:

DESIGNED UNDER THE DIRECTION OF:

PROJECT NO: 592-59140

CONTRA COSTA COUNTYDATE: DECEMBER 2019WOODARD

CURRAN

DATE C-24CIVILGRADING AND PAVING 4

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4. Work is included in Additive Bid Item A3 and shall be performed if Additive Bid Item A3 is accepted. Refer to Specification 01025 - Measurement and Payment for additional detail on Additive Bid Items.

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CHECKED:




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ADDENDUM NO. 1 Wastewater Treatment Plant (“WWTP ...

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